MnDOT Roundabout Design Workshop

May 23-25, 2023
Day One: 9:00 a.m.–4:00 p.m. Central
Day Two: 8:00 a.m.–4:00 p.m. Central
Day Three: 8:00 a.m.–4:00 p.m. Central

MnDOT Shoreview Training and Conference Center
1900 County Road I West
Shoreview, MN 55126
United States

About the Event:
This three-day workshop is designed for engineers from both agencies and consulting firms who deliver
roundabout projects for MnDOT. The training will focus on chapter 6 of the MnDOT Facility Design
Guide. Its goal is to help participants use the MnDOT Geometric Design Support Unit's design approval
processes and improve their ability to analyze roundabout capacity, develop a layout, and predict an
alternate outcome of a design modification. This workshop will include hands-on training using drafting
exercises for simple, compact urban, mini, skewed, and 2+1 roundabouts.

At the training, participants will:

  • Use guidelines and design preferences from chapter 6 of the MnDOT Facility Design Guide.
  • Describe circle sizing and placement.
  • List MnDOT Intersection Control Evaluation (ICE) documentation elements and discuss lane
  • configuration and expandability.
  • Compare computer software (CADD, HCM spreadsheet, etc) design examples with chapter 6 of
  • the MnDOT Facility Design Guide.
  • Discuss roundabout design performance parameters.
  • Identify special roundabout considerations (oversized/overweight, ADA, longitudinal grades,
  • maintenance, landscaping, signing, and high-speed approaches).
  • Use layout sketching techniques and outline variation in design and design checking.
  • The workshop curriculum features the following case examples:
  • Simple Roundabout: SP 2510-55 TH 58 in Goodhue
  • Compact Urban Roundabout: SP 6106-25 TH 29 in Glenwood
  • Mini Roundabout: SP 5916-117 TH59 in Pelican Rapids
  • Skewed Roundabout: SP 3609-48 TH 53 in International Falls/SP 1807-32 TH 210 in Crosby
  • 2+1 Roundabout: SP 1008-104 TH 41 in Chaska


Questions? Contact Rachel Brodeur at brode080@umn.edu

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